Just in case you found yourself wondering about Paris Hilton's exact whereabouts in the moments before her margarita-tinged wheeze worked its way through a Swarovski crystal-encrusted Breathalyzer tube, a Defamer operative dropped this note in our inbox last night before news of Hilton's DUI arrest went public, after spotting her and the usual, club-monkey suspects at a charity event at Dragonfly:

Went to the Suicide Girls 5th anniversary party at Dragonfly. In a very public booth sat Joe Francis, Kevin Connelly and Nicky & Paris Hilton. Paris, who looks like a skinny old woman in a synthetic wig, laughed and snapped photos while a dominatrix on stage pretended to beat up girls dressed as Jessica Simpson, Britney Spears and Nicole Richie. Pretty sure I saw Kevin Federline leave after Sarah Silverman's set too.

Unfortunately, the brief report contained no accounting of Hilton's alcohol intake that might cast into doubt the Single Margarita on an Empty Stomach Theory. And while Hilton managed only a pitiful .08 last night, she'll get a chance to boost her scores to less embarrassing levels at a party celebrating the pooped-to-video release of her latest movie, the appropriately titled Bottoms Up:

Cabana Tonight Thursday Sept 7th 2006 Hosted by Paris Hilton & Jay Mewes

You and a Guest are invited to Cabana Club to join Paris and Jay in celebration of their new DVD "Bottoms Up".

Official DVD Release Party for "Bottoms Up" hosted by Paris Hilton and Jay Mewes

Featuring Special Live Performance by Sleepy Brown singing the classic #1 hit "The Way You Move" & new hit single "Margarita" featuring Pharrell and Big Boi of Outkast! Thursday September 7th, 2006 Doors Open at 9:30 P.M.

Music Provided By DJ Coolwhip

This Event will reach Capacity Quickly so please get there EARLY!!!!

Let's hope she shows up and gets a chance to extend that DUI streak to two consecutive weeknights.